Keystones — Lintel
Five GCSE retrieval questions · 11 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.077 in standard form
Answer: 7.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.79cm -
4. Ratio Mixed ratio problems
£235.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £141.00 -
5. Statistics Mean
Calculate the mean of: 22, 41, 11, 12, 40, 6, 28, 23. Give your answer to 2 decimal places
Answer: 22.88